15 Blenheim Square

What the assessor found

Each part of the home, with the certificate's own energy efficiency rating.

• Walls

  Solid brick, as built, no insulation (assumed)

  Very poor

• Roof

  (another dwelling above)

  Not rated on the certificate

• Floor

  Suspended, no insulation (assumed)

  Not rated on the certificate

• Windows

  Partial double glazing

  Poor

• Heating

  Boiler and radiators, mains gas

  Good

• Heating controls

  Programmer, room thermostat and TRVs

  Good

• Hot water

  From main system

  Good

• Lighting

  Low energy lighting in 50% of fixed outlets

  Good

The assessor's estimates at the energy prices in use when the certificate was made (2018), for a typical household. Today's bills will differ.

Improvements the certificate recommends

In the certificate's order. Each rating assumes the steps before it are done.

1. 1

   50 mm internal or external wall insulation

   Typical cost £4,000–£14,000 · saves about £241 a year

   Rating after73C
2. 2

   Floor insulation (suspended floor)

   Typical cost £800–£1,200 · saves about £76 a year

   Rating after75C
3. 3

   Low energy lighting for all fixed outlets

   Typical cost £25 · saves about £36 a year

   Rating after76C
4. 4

   Replace single glazed windows with low-E double glazed windows

   Typical cost £3,300–£6,500 · saves about £36 a year

   Rating after77C

Costs and savings are the certificate's own, as estimated when it was made.